NASA Openly Admits That Alien Life Exists And...

Aside from extra-terrestrial beings visiting our planet:
Scientists are trying to learn about many different E.T. races tinkering with our DNA over millennia and also about the truth behind the life of E.T. beings been on earth.

There are many creatures other than humans on the earth.
No doubt, if we separate the list of human beings and other living organisms than the list of insects and animals would be long enough.